diff --git a/TODO.markdown b/TODO.markdown
index b479118a..16582cdd 100644
--- a/TODO.markdown
+++ b/TODO.markdown
@@ -1,10 +1,6 @@
 # TODO
 
 * Support for on-the-fly-signing or check how to do it
-* Test all rdata packing with zero rdata -- allowed for dynamic updates
-* Actually mimic net/ ? Dial. Read/Write ?
-    - if I want this i need to work on something else than \*Client, because a single client
-      can have multiple oustanding qeuries
 * Ratelimiting? server side (rrl)
 * Ratelimiting? client side
 
diff --git a/dns.go b/dns.go
index ed7b87cf..003908c4 100644
--- a/dns.go
+++ b/dns.go
@@ -61,7 +61,10 @@
 //      c := new(Client)
 //      in, rtt, err := c.Exchange(m1, "127.0.0.1:53")
 //
-// For asynchronous queries it is easy to wrap Exchange() in a goroutine.
+// For asynchronous queries it is easy to wrap Exchange() in a goroutine. Suppressing
+// multiple outstanding queries (with the same question, type and class) is as easy as setting:
+//
+//	c.Inflight = true
 //
 // A dns message consists out of four sections.
 // The question section: in.Question, the answer section: in.Answer,